Union Station

"Tiffany covered everything beautifully - the only thing I'd add is that if you go to the National Air and Space Museum - which I would recommend, as it's one of the more unique DC museums - I'd walk from Union Station rather than take the Metro." See More

"First, Union Station is a beautiful place in and of itself full of shops and restaurants, so you'd rather spend your time playing in DC than finding a restaurant, then you can easily grab quick food either before or after your 6 hour stop." See More

"Union Station has a dedicated floor of their parking garage for bus lines, complete with a waiting room and bathrooms (that are nicer than the ones in the actual station, in my opinion)." See More

"From here, either walk to Union Station right next to the National Postal Museum or walk/metro to the Eastern Market which is a nice market (with great pancakes) and a fun area just to walk around and absorb a bit of the local ambiance." See More

"During the week, easy: Take the MARC train (google MARC train BWI for schedule) from Union Station." See More

"Union Station is basically at the "top" of the National Mall." See More

"Take the metro directly from Union Station to Judiciary Square Metro Station and it's a quick five minute walk to the mall from there." See More